Actually ceiling speakers like to see larger spaces, like attics. The 6″ space is fine for the small of the spaces as you`ll have over 5 cu. ft. of airspace behind (which is what qualifies as “infinite baffle”).
So short answer: Don’t worry.
>> Name :
>> Message :
>> We have a vaulted ceilings. The roof line is very close (6″) and
>> parallel to one plane of the vaulted ceiling. On the other plane of
>> the vaulted ceiling, the gap between the roof and the ceiling
>> increases (lots of attic space) as the ceiling comes down from the
>> center. I plan on putting the in-ceiling speakers on the second side
>> of the vaulted ceiling. These speakers will back into a large attic.
>> Hence there will be no “box” behind the speakers, but open space. Will
>> in-ceiling speakers be able to produce good sound in such an
>> environment? Is a box necessary to produce good sound? Should I try
>> and create my own box to sorround the speakers inside the attic?